TongueMuscles Flashcards
(38 cards)
Motor Innervation of Tongue (as a whole)
CN XII - Hypoglossal
Sensory Innervation of Tongue (as a whole)
CN V3 and CN IX glossopharyngeal
Taste Innervation of Tongue (as a whole)
CN VII - Facial and CN IX - Glossopharyngeal
Function of Tongue
Manipulates food bolus during chewing/swallowing, functions in speech
4 muscles that insert onto the Tongue
Genioglossus
Styloglossus
Hyoglossus
Palatoglossus
Genioglossus Innervation
CN XII - Hypoglossal
Genioglossus Fxn
Protrudes tongue, depresses tongue, elevates sides of tongue
Injury to genioglossus presents as?
Tongue points/leans to the affected side
Styloglossus Innervation
CN XII - Hypoglossal
Styloglossus Fxn
Retracts tongue, elevates sides of tongue
Hyoglossus Innervation
CN XII - Hypoglossal
Hyoglossus Fxn
Depresses Tongue
Palatoglossus Innervation
CN X - VAGUS
Palatoglossus Fxn
Elevates tongue, constricts posterior opening of the oral cavity
Rule 1 of “Stern’s Rule”
Muscles called “Tensor” are CN V3
Rule 2 of “Stern’s Rules”
Muscles called “palat” are CN X unless also called “tensor”
Rule 3 of “Stern’s Rules”
Muscles called “glossus” are CN XII unless also called “palat” or also called “tensor”
Geniohyoid Innervation
C1 ventral ramus via CN XII - hypoglossal
Geniohyoid Fxn
Pulls hyoid anteriorly, shortens floor of mouth, widens pharynx
Posterior Belly of Digastric Innervation
CN VII - Facial Nerve
Anterior Belly of Digastric Innervation
Inferior Alveolar Nerve (branch of CN V3)
Digastric Fxn
Elevates hyoid during swallowing/speaking, can also depress mandible
Mylohyoid Innervation
Inferior Alveolar Nerve (branch of CN V3)
Palatopharyngeus Innervation
CN X - Vagus (palat-)
